Residents of a small Midwestern town are frightened when an abandoned lighthouse is haunted.

The Mystery Inc. gang visits a robot resort for living out Western movie fantasies. Then the robots turn on the gang.

When Scooby and the gang return to Coolsville for Valentine's Day, they discover that teenagers are being kidnapped form Lover's Lane -- and they are the prime suspects. To make matters worse, Shaggy learns that his former girlfriend is now dating JC Chasez!